Dream on
Sure, it wouold be nice and emotionally satisfying, but it isn't the cops who make those laws. Why punish them? Look around, it is the people in your state that elect the idiots who promote those laws and pass them.
We here like guns. We know guns. We know the good they can do. Most of the rest of the people only know the bad, and because of that, don't like guns. They are wrong, of course, but their votes count the same as ours.
Police markets are the bread and butter of handgun makers, and it takes a lot of guts (and individual control) to give up a segment of the market over a political issue. Ronnie Barrett did, no .50s for California LEO, because CA law says no .50 for civilians. Gutsy move. He's proud of it. He puts it in his ads! And I am proud of him for doing it. He's a real stand up guy, and here's where he stands! Makes you wonder why the rest of the gun and ammo makers don't do something similar, right?
Well, it boils down to a couple of things. Money, for one. The media constantly portrays the gun industry as a huge force, but the reality is different. Gun makers don't employ all that many people, compared to many other businesses. Gun maker with more than a thousand employees are few in number, and some smaller outfits don't even employ a hundred. They don't have the deep pockets of the oil companies, or auto makers. Giving up a significant market on principle is a huge hardship.
And, most gun companies are no owned by individuals, but by stockholders, and enough of them are only concerned with profits, and anything that reduces profits they will vote against.
And, unlike Barrett, if your product is still legal for sale to the public in CA, you've got a real hard sell, because by boycotting the police and other govt agencies, you will get a xxxxstorm of condemnation, even from the anti-gunners, for not allowing the police to protect the people with your product! it will take a real bad law (like ser# ammo or microstamping), where the gun makers are going to lose huge amounts of money no matter what they do in order to get them to boycott a state.
And, odds are, the state won't care. The politicians won't care (some will actually by glad), the police will just get their guns and ammo from other makers, probably foreign ones who don't care about any of our 2nd Amendment issues, all they care about is selling their product. And in the end, the most likely result is damage to the gun industry form loss of revenue and bad PR, and a lot of really ticked off people on both sides of the issue.
If Kimber (or S&W, or some other American gun maker) boycotts LAPD, I'm sure that Glock, or Sig or Beretta, or some other maker will be happy to take up the slack. Unless you can convince them ALL to do it, it ain't gonna work, and even if you could get them all to do it, there is still no guarantee of getting what you want.